Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7415d15d60c8ffec…

MALICIOUS

Office (OLE)

146.5 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel First seen: 2015-10-01
MD5: 9edbcfc40f0971160511830c8c13ec21 SHA-1: c3cde67fad76ef46aa16c81212a062adfdcf4c4f SHA-256: 7415d15d60c8ffec1afd808933193bcb393dc90808efc2e91a325bf4edc8c154
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical heuristic firing for 'OLE_XLS_FORMULA_MACRO_VIRUS' and the medium firing for 'OLE_XLM_AUTOOPEN' indicate the presence of legacy Excel 4.0 macros. The document body explicitly mentions 'Excel Formula Macro Virus (XF.Classic)' and 'Hydrocodone/APAP 10-650 For Your Computer', suggesting a lure for potentially illicit pharmaceutical purchases or a general financial scam. The macro appears designed to infect other workbooks and save them as Book1.xls, indicating a downloader or self-propagating mechanism.

Heuristics 2

  • Legacy Excel formula macro virus marker critical OLE_XLS_FORMULA_MACRO_VIRUS
    Workbook stream contains self-identifying legacy Excel formula macro virus markers. This indicates the document carries formula macro virus content even when no VBA project or modern XLM macro-sheet structure is present.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

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